基于UWB的室内信道模型毕业论文

下载后可任意编辑 下载后可任意编辑 摘 要 超宽带（UWB：Ultra-Wideband）脉冲无线传输技术是国际上最近二、三十年正在蓬勃兴起的一种无线通信的革命性传输技术。UWB技术具有传输速率高、系统容量大、抗多径干扰能力强、功耗和成本低等优点，已逐渐成为无线通信领域讨论开发的一个热点，并被视为下一代无线通信的关键技术之一。为保证UWB信号在室内复杂环境传输的有效性和可靠性，必须要求我们准确掌握其信道特性，本文正是在此认识上完成UWB室内信道模型的讨论和MATLAB仿真分析。 本主要对UWB室内信道模型进行了探讨和仿真讨论。文中首先简要介绍了超宽带的基本概念及特点，并对UWB信道的基本理论做了简要的介绍。在信道基本理论的介绍中重点介绍了时域测量技术及建模过程中的后期数据处理方法—CLEAN算法，以便于信道建模的仿真分析。针对UWB室内信道的特点，分析了现有的各种UWB室内信道模型，并且对IEEE 802.15.3a标准模型进行了MATLAB仿真分析，并且与南加州大学UWB实验室实际信道测量得出的信道指标进行了比较，仿真结果表明S-V模型和IEEE 802.15.3a标准模型能够较好的拟合室内NLOS信道环境，但对室内LOS信道环境的性能尚显不足。而室内LOS半确定模型（双簇模型）在LOS环境下能够很好的拟合实验数据。 最后对本文所做的工作和结论进行了汇总，指出不足之处及改进方向。 关键词 超宽带 UWB 信道模型 S-V模型 MATLAB 下载后可任意编辑 ABSTRACT The Ultra Wideband technology is one kind of revolutionary wireless communication technology emerged in recently 20 or 30 years in the world. For the advantage of high transmission speed, limit power wastage and low cost, UWB technology has became a hotspot gradually in wireless communication research and was considered a key technology of next wireless communication generation. In order to insure the validity and the reliability of the signals transmitted in the complex indoor environment, the accurate characteristic of UWB indoor channel should be mastered. This article is in this understanding to complete the UWB indoor channel model and the MATLAB simulation. The principal of the UWB indoor channel model is discussed and simulation. The paper first briefly introduces the basic concepts of UWB and characteristics, and gives a brief introduction for the basic theory of UWB channel. The basic theory of the channel focuses on the introduction of time-domain measurement and modeling in the process of post data processing -CLEAN algorithm for modeling and simulation analysis in the channel. For the UWB indoor channel characteristics of various existing UWB indoor channel model and the model for the IEEE 802.15.3a standard MATLAB simulation analysis, and the University of Southern California Laboratory of the actual UWB channel measurement indicators derived from the channel comparison, simulation results show that the S-V model and the IEEE 802.15.3a standard model can fit the indoor NLOS channel environment, but on the indoor LOS channel environment of insufficient perance. LOS half to determine the indoor model (two-cluster model) in the LOS environment, a good fit to experimental data. Finally, the paper work and this article summarizes conclusions, pointing out deficiencies and improvement. Key words Ultra Wideband UWB Channel model S-V model MATLAB 下载后可任意编辑 目 录 目 录I 第一章 绪论1 1.1 超宽带（UWB）无线通信技术概述1 1.2 UWB技术的优点与主要应用2 1.3 UWB信道与传统信道的比较3 1.4 UWB信道模型的国内外讨论现状4 1.5 本章小结5 第二章 ＵＷＢ信道的基本理论6 2.1 UWB信号的传播特性6 2.2 信道测量技术7 2.3 后期数据处理方法——Clean算法9 2.4 Clean算法门限选择12 2.5 本章小结13 第三章 超宽带室内信道模型14 3.1 简单的泊松模型14 3.2 修正的泊松模型14 3.3 模型15 3.4 修正的模型17 3.5 本章小结18 第四章